import router from './router'
import store from './store'
import { Message, Notification } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          await store.dispatch('user/getInfo')
          // get routes
          await store.dispatch('permission/asyncRouterList')
          router.addRoutes(store.getters.asyncRoutes)
          // Dynamic route, 404 route must be added at the end. Note that 404 route cannot be added in static route
          router.addRoutes([
            {
              path: '*',
              redirect: '/404',
              hidden: true
            }
          ])
          // When a request has a redirect, the login is automatically redirected to that address
          const redirect = decodeURIComponent(from.query.redirect || to.path)
          if (to.path === redirect) {
            // The hack method ensures that addroutes is complete and set replace: true so that the navigation will not leave a history
            next({ ...to, replace: true })
          } else {
            // Jump to destination route
            next({ path: redirect })
          }
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.onError((error) => {
  NProgress.done()
  // Display the following failure information when routing fails
  Notification.error(error.message)
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
